Frictional power-transmission device.



v E. H; MANN 0.. FRICTIONAL POWER TRANSMISSION DEVICE.

APPLICATION FILED OOT.1B, 1907.

Patented Nov. 10, 1908.

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EBEXEZER niilxxlxc, OF ELKHART, INDIASKEEST CODY X A u FRICTIONAL POWER-TRANSMISSION DEVICE.

ing at Elkhart, in the county of Elkhart and State of Indiana, have invented new and useful Improvements. in Frictional Power-Transmission Devices, of which the followingis a specification) This invention relates to frictional power transnnssion dev ces which are used for the transmission of power a motor driven shaft to another shaft which is directly con nected with the parts to be driven; the princlpal objects of the invention being'to reta n perfect control of the mechanism -when driven at varying speeds;

The invention has particular reference to that class of power 'transmissiondevices in which a friction. disk carried by the motor driven shaft is in peripheral contact with two oppositely disposed driven disks whichare in parallel relation with eachother; said driven disks serving. to transmit-motion to an intermediatelydisposed friction wheel which is longitudinally movable upon the driven shaft said friction disk being adj ust able. diametrically across the faces of-the op -m-of controlling the speed as well as the positely disposed parallel disks for the purtionof rotation," the speed being governed by the distance of the driven diskfroint-he .axes of the oppositely disposed friction disks, while the direction of rotation is reversed" by transferring the driven disk from one side of said axes. to the other side thereof; and it being further under- I stood that when the diameter of the driven disk 'coincides with the axes of the oppos sitelydisposed driving disks it will remain 4.0

stationary and will, in point of fact, operate as a .brake.

In devices of the class described, it has been found that .power hasbeen lost owing to frictional resistance between the rim or 4:5

periphery of thedriven disk and the faces of the oppositely disposed driving d sks;

this is explained on the hypothesis that different points of the faces of the drivingdisks at different distances from the axes of said disks, or, in other words, d fferent points in the same radius, move at different speeds according to the distance of such ,points from the central point or axls; while the different points in the periphery of the driven disk simultaneously contacting with the face of a' driving disk move at equal Specification .of Letters Patent.

be'resorted to when desired.

I speed; hence, a very objectionable friction will be developed between the contacting portions of the faces of the driving disks and the rim of the driven disk; and this friction-will be increased with everyincrease in-the width of the driven disk. And inasmuch as, in order to secure transmission, the

said' driven disk is usually made with a com -ta'ct face an inch or more in width, and the contacting surfaces being moreover of such a natufe as to induce and promote frictional contact, it is obvious that the loss'ofpower from this cause becomes an item of considerable importance.

The principal object of the present invention is to overcome the objections just referred to; further objects being to simplify and improve the construction and operation of this class of devices.

Patented Nov. 10, 1908. Application filed October 18, 1907. Serial'No. 2398,1 11.

. With these and other ends in view which willreadily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claim.

In the accompanying drawings has been illustrated a simple and preferred form .of the invention; it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the invention may are denoted by like characters of reference,

The frame 1 of the improved transmission device is provided with suitable bearings for the motor driven shaft 2 and the transmission shaft 3 which are disposed in axial ;alinement with each other. The frame 1 is also providedwith bearings for shafts fl, disposed at right angles to the shafts 2 and "3, and carrying fricti'on wheels or disks 5" having. beveled rims or peripheries which are adapted forfrict-ional contact with a correspondingly beveled friction wheel 6 carried by the motor driven shaft 2. Means are provided wherebv relative adjustment of the friction Wheels or disks 5 and 6 may be.

effected for the purpose of regulating the degree of frictional contact between said disks; but the mechanism whereby this ad 5 justment is effected is not regarded as part of the present invention, and does not require to be herein described or illustrated in detail. I Slidably mounted upon the transmission shaft 3, and connected therewith for rotation by means of a feather or spline 7 is a hub'S carrying the friction equalizing disk 9,.the periphery of which is in frictional cont-actor engagement with the faces of the oppositely disposed friction disks 5-5. The

hub '8 is adjustable upon the shaft 3 means of a'suitably operated sliding rod 10 carrying a ring 11- that engages an annular groove in the hub 8. The equalizing disk 9 is in the nature of a compensating gearin and it comprises a central or intermediate disk or flange 12 extending from and con nected with the hub 8, said flange being provided with a plurality of equidistant ertures 13 wherein bevel pinions 14 are supported for rotation upon pins or shafts 15 whichiare radial .to the axis of the hub 8. The latter supports, adjacent to the-flange I 12, a pair of rings 16 provided upon their inner faces with circular racks 17 meshing withthepinions 14, and constituting in con-' junction therewith a compensating gear, as previously stated. The rings 16 are retained in engagement with the pinions carried by the flange 12 by means of annular connecting members 18 which are secured by means of fastening members such as screws .19 upon 'the ends of the hub, thus assembling and connecting the several parts without pro-- 40 venting or interfering with the free and independent movement of said parts. he flange 12 and the rings 16 are in periphe *al engagement with the oppositely disposed friction disks 5, the faces of which are unobstructed so that the friction equalizing wheel may be moved diametrically across said faces in contact therewith.

It will be readily seen froin'tlie foregoing that the friction equalizing wheel has a peripheral contact face comprising a plu- 5o rality of independent contact points. formed by the peripheries of the flange 12 and the rings 16. These members while. operatively connected with 'each other, are capable of free and independent movei'ne'nt, and the speed of eachwill adjust itself to the speed of the portion of the face of the friction disk with which it is in actual contact, and which varies according to its distance .r'ifOl'fl the axis of the disk. The different portionslso ofthe rim ofthe friction equalizing wheel will thus ad ust themselves witlrregard to speed, and much objectionable friction will thus be avoided.

Having thus fully'dcscribed the invention, what is claimed as new is:

In a frictional powertransmitting device. the combination of a driving shaft carrying a friction disk, a'pair of oppositely disposed rotary transmission disks for cooperation 7o therewith, a tIHDSIHlSSlODSllZIftsuppor d in longitudinal alinement with the dr ving shaft, a sliding sleeve on said transmissionshaft, and a frictional transmission wheel comprising a main disk provided with a hub 7 5 extending beyond opposite sides thereof and integral with. said sleeve, supplementar disks mounted. upon the hub on opposite sides of said m'ain disk, differential gearing connecting the disks. annular retaining rings having smooth surfaced openings receiving the-ends of the sleeve, saidrings being arranged to bear against the outer-(ends of the hub and outer facesof the supplementary disks to retain the latter in operative relation to the main disk, and .fastenings passing t *ansversely through said rings into the ends of the hub. s v

In testimony whereof I aflix my signature in presence of two witnesses.

EBENEZER- H. MANNING. WVitnesses:

VVM. Ensure, JOHN L. Fiarroi-inu. 

